Abstract:
Eastern Pingyi area is an important gold producing region in western Shandong Province. In the late 1980s, the only large-scale gold deposit, Guilaizhuang gold deposit,was discovered in this area. The deposit occurs in the nearly EW trending F1 structural alteration zone, and is a structural cryptoexplosive breccia type of gold deposit which has experienced multiple periods of activities. A series of monographic studies have been carried out and different opinions on ore control have been proposed ever since. Based on the previous studies, this paper reorganized the main ore controlling factors of gold mineralization in this area and put forward the Trinity ore controlling characteristics of Mesozoic hypabyssal intrusive rock, carbonate rock and fault structure, thus established a new metallogenic model characterized by conjugate x-shear fault. This study made a breakthrough in ore controlling structure, and found that gold ore bodies mainly occur in conjugate X-shaped faults. The intersection of conjugate faults and the tracing tensile fracture zone of conjugate faults were the most favorable metallogenic sites.